Furnace-door opener.



M. WALTON.

FURNACE DOOR OPENER.

AP PLICATION FILED OCT. 2. 1916.

l,%1,01. PatentedSept, 25, 1917. I

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MORRIS WALTON, OF DELAWARE, OHIO.

FURNACE-DOOR OPENER.

Specification of Letters Patent.

Patented Sept. 25, 191?.

Application 'filefi October 2, wit}. Serial No. 123,357.

To all whom it may concern:

Be it known that I, MoRRIs l/VALTON, a citizen of the United States, residing at Delaware, in the county of Delaware, State of Ohio, have invented certain new and useful Improvements in Furnace-Door Openers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention is directed to improvements in devices for opening furnace doors, and has for its object to provide a device of this character which can be easily applied to a furnace already in use.

A further object of the invention is to provide a device of this character constructed in such a manner that a person can upon operating a foot piece operate the device to quickly swing the furnace door to its open position.

A still further object of the invention is to provide a device of this type having means for returning the door engaging plate to its inoperative position.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which Figure 1 is a front elevation of the device showing the same applied to a furnace.

Fig. 2 is a sectional view on line 2-2 of Fig. 1.

Fig. 3 is a sectional view on line 3-3 of Fig. 1.

Fig. 4 is a detail perspective view of the door engaging plate.

The device comprises a shaft 1, which has its lower end rotatably engaged in the bearing 2, said bearing being supported by the base of the furnace 3. The upper end of the shaft is rotatably engaged in the bearing 3' carried by the body of the furnace, and located adjacent the door 4:, said door being of a conventional form and provided with a lug 5 for engaging the notch 6 of the catch to hold the door closed. 7

A sleeve 7 is employed and is adjustably mounted on the shaft 1, said sleeve being provided with a set screw 8, whereby the same can be held in adjusted position on the shaft. The sleeve is provided with a horizontal arm 9, the purpose of which will appear later.

A 'c'ain plate 10 is provided which is intended to engage the lug on the door to disengage said lug from the catch. This cam plate, has a socket 11 formed on its under surface, said socket carrying a set screw 12 so that when the arm 9 is engaged in the socket the plate can be held in adjusted positions. The inner edge of the cam plate 10 is formed with a vertically extending curved tapered flange 13, the highest end of which is provided with a lip 14, the purpose of which will later appear.

A sleeve 15 is engaged on the shaft 1 and is located slightly above the bearing 2, said sleeve being provided with a horizontal operating foot piece 16, and since the sleeve is fixed to the shaft 1 by a set screw 17 it is obvious that the shaft can be rotated in its bearings upon applying pressure to the foot piece. A spring 18 is provided and has one end connected to the sleeve 15 and its other end connected to the bearing 2, said spring serving to return the cam plate 10 to its inoperative position after the door 4: has been opened.

It will be noted that the flange 13 has its lowest end normally engaged with the lug 5 so that when the shaft 1 is rotated to swing the cam plate 10 outward the flange will move under the lug and elevate the same until it disengages the notch 6. Continued movement of the cam plate 10 will cause the lip 14f to engage the lug, thus swinging the door 4 to its open position. As soon as the foot piece 16 is released the spring 18 will act to return the plate to its inoperative position. Since the cam plate 10 is adjustably connected to the arm 9 it is obvious that the cam plate can be adjusted so as to accommodate the cam plate to the difierent forms of door lugs.

What is claimed is 1. The combination with a door having a lug and a catch disposed for engagement with the lug, of a shaft journaled adjacent the door, a sleeve carried by the shaft, a cam plate carried by the sleeve constructed and arranged to engage the lug on the door with its cam surface to disengage said lug from the catch during the rotation of the shaft, a second sleeve carried by the shaft, a shaft operating foot piece carried by said second sleeve, and means for reversely operating the shaft when the foot piece is released.

2. The combination with a door having a lug and a catch disposed for engagement with the lug, of a shaft journaled adjacent the door, a sleeve adjustably carried by the upper portion of the shaft, an arm carried by'the sleeve, a cam plate carried by the arm constructed and arranged to engage thelug on the door with its cam surface to disengage said lug from the catch during the rotation of the shaft, a sleeve adj ustaloly carried by the lower portion of the shaft, a shaft operating foot piece carried by the sleeve, and means for reversely operating the shaft when the foot piece is released.

In testimony whereof, I aflix my signature, in the presence of two Witnesses.

MORRIS WALTON.

, Witnesses:

W. BARTON HARTLEY, WILLIAM B. CARSON.

Copies 0; this patent may be obtained tor'flve cents each, by addressing the Commissioner of Patents,

Washington, D. 0." 

